1968 Plymouth Barracuda Neutral Safety Switch

Where is the Safety Neutral switch? And what is the wire hook up on the shifter

68 318 auto floor shift

NSS is on the transmission, wire goes to starter relay. 65'

68? / earlier has a single post NSS on the transmission. This grounds the coil of the starter relay so that when you twist the key, the relay coil will activate.

69?/ later has a 3 pin NSS the center pin is NSS and the outer pins are the reverse lamps

On your car if it has the single pin switch, the switch on the shifter is for your reverse lamps